﻿using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Text;
using System.IO;

namespace MSL.Utility.Video
{
    /// <summary>
    /// 
    /// </summary>
    public class VideoUp : System.Web.UI.Page
    {
        public VideoUp()
        {

        }
        //文件路径
        public static string ffmpegtool = Config.Helper.GetApp("ffmpeg");
        public static string mencodertool = Config.Helper.GetApp("mencoder");
        public static string upFile = Config.Helper.GetApp("upfile") + "/";
        public static string imgFile = Config.Helper.GetApp("imgfile") + "/";
        public static string playFile = Config.Helper.GetApp("playfile") + "/";
        //文件图片大小
        public static string sizeOfImg = Config.Helper.GetApp("CatchFlvImgSize");
        //文件大小
        public static string widthOfFile = Config.Helper.GetApp("widthSize");
        public static string heightOfFile = Config.Helper.GetApp("heightSize");
        //获取文件的名字
        public static string GetFileName(string fileName)
        {
            int i = fileName.LastIndexOf("\\") + 1;
            string Name = fileName.Substring(i);
            return Name;
        }
        //获取文件扩展名
        public static string GetExtension(string fileName)
        {
            int i = fileName.LastIndexOf(".") + 1;
            string Name = fileName.Substring(i);
            return Name;
        }

        #region 运行FFMpeg的视频解码，(这里是绝对路径)
        /// <summary>
        /// 转换文件并保存在指定文件夹下面(这里是绝对路径)
        /// </summary>
        /// <param name="fileName">上传视频文件的路径（原文件）</param>
        /// <param name="playFile">转换后的文件的路径（网络播放文件）</param>
        /// <param name="imgFile">从视频文件中抓取的图片路径</param>
        /// <returns>成功:返回图片虚拟地址;   失败:返回空字符串</returns>
        public string ChangeFilePhy(string fileName, string playFile, string imgFile)
        {
            //取得ffmpeg.exe的路径,路径配置在Web.Config中,如:<add   key="ffmpeg"   value="E:\aspx1\ffmpeg.exe"   />   
            string ffmpeg = Server.MapPath(VideoUp.ffmpegtool);
            if ((!System.IO.File.Exists(ffmpeg)) || (!System.IO.File.Exists(fileName)))
            {
                return "";
            }

            //获得图片和(.flv)文件相对路径/最后存储到数据库的路径,如:/Web/User1/00001.jpg   

            string flv_file = System.IO.Path.ChangeExtension(playFile, ".flv");


            //截图的尺寸大小,配置在Web.Config中,如:<add   key="CatchFlvImgSize"   value="240x180"   />   
            string FlvImgSize = VideoUp.sizeOfImg;

            System.Diagnostics.ProcessStartInfo FilestartInfo = new System.Diagnostics.ProcessStartInfo(ffmpeg);

            FilestartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;

            StringBuilder sb = new StringBuilder();
            sb.AppendFormat(" -i \"{0}\" -ab 56 -ar 22050 -b 500 -r 15 -s {1}x{2} \"{3}\"", fileName, widthOfFile, heightOfFile, flv_file);
            FilestartInfo.Arguments = sb.ToString();// @" -i '" + fileName + "' -ab 56 -ar 22050 -b 500 -r 15 -s " + widthOfFile + "x" + heightOfFile + " \"" + flv_file + "\"";
            //ImgstartInfo.Arguments = "   -i   " + fileName + "   -y   -f   image2   -t   0.05   -s   " + FlvImgSize + "   " + flv_img;

            try
            {
                //转换
                if (!File.Exists(flv_file))
                {
                    System.Diagnostics.Process p = System.Diagnostics.Process.Start(FilestartInfo);
                    p.WaitForExit();
                    p.Close();
                    p.Dispose();
                }
                //截图
                if (!File.Exists(imgFile + ".jpg"))
                {
                    CatchImg(fileName, imgFile);
                }
                //System.Diagnostics.Process.Start(ImgstartInfo);
            }
            catch
            {
                return "";
            }
            //
            return "";
        }

        public string CatchImg(string fileName, string imgFile)
        {
            //取得ffmpeg.exe的路径,路径配置在Web.Config中,如:<add   key="ffmpeg"   value="E:\aspx1\ffmpeg.exe"   />  
            string ffmpeg = Server.MapPath(VideoUp.ffmpegtool);
            //
            string flv_img = imgFile + ".jpg";
            //
            string FlvImgSize = VideoUp.sizeOfImg;
            //
            System.Diagnostics.ProcessStartInfo ImgstartInfo = new System.Diagnostics.ProcessStartInfo(ffmpeg);
            ImgstartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
            //
            ImgstartInfo.Arguments = " -i " + fileName + " -y -f image2 -ss 2 -vframes 1 -s " + FlvImgSize + " " + flv_img;
            try
            {

                if (!File.Exists(imgFile + ".jpg"))
                {
                    System.Diagnostics.Process p = System.Diagnostics.Process.Start(ImgstartInfo);
                    p.WaitForExit();
                    p.Close();
                    p.Dispose();
                }
            }
            catch
            {
                return "";
            }
            //
            if (System.IO.File.Exists(flv_img))
            {
                return flv_img;
            }

            return "";
        }
        #endregion

        #region 运行mencoder的视频解码器转换(这里是(绝对路径))
        public string MChangeFilePhy(string vFileName, string playFile, string imgFile)
        {
            string tool = Server.MapPath(VideoUp.mencodertool);
            //string mplaytool = Server.MapPath(PublicMethod.ffmpegtool);

            if ((!System.IO.File.Exists(tool)) || (!System.IO.File.Exists(vFileName)))
            {
                return "";
            }

            string flv_file = System.IO.Path.ChangeExtension(playFile, ".flv");


            //截图的尺寸大小,配置在Web.Config中,如:<add   key="CatchFlvImgSize"   value="240x180"   />   
            string FlvImgSize = VideoUp.sizeOfImg;

            System.Diagnostics.ProcessStartInfo FilestartInfo = new System.Diagnostics.ProcessStartInfo(tool);

            FilestartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
            FilestartInfo.Arguments = " \"" + vFileName + "\" -o \"" + flv_file + "\" -of lavf -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames -oac mp3lame -lameopts abr:br=56 -ovc lavc -lavcopts vcodec=flv:vbitrate=200:mbd=2:mv0:trell:v4mv:cbp:last_pred=1:dia=-1:cmp=0:vb_strategy=1 -vf scale=" + widthOfFile + ":" + heightOfFile + " -ofps 12 -srate 22050";
            try
            {
                if (!File.Exists(flv_file))
                {
                    System.Diagnostics.Process p = System.Diagnostics.Process.Start(FilestartInfo);
                    p.WaitForExit();
                    p.Close();
                    p.Dispose();
                }
                if (!File.Exists(imgFile + ".jpg"))
                {
                    CatchImg(flv_file, imgFile);
                }
            }
            catch
            {
                return "";
            }
            return "";
        }
        #endregion
    }
}
